#27955: JSONField.default not applied in admin
----------------------------------+--------------------------------------
Reporter: Jannis | Owner: nobody
Type: Bug | Status: closed
Component: contrib.admin | Version: 1.10
Severity: Normal | Resolution: invalid
Keywords: JSONField, admin | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Changes (by Tim Graham):
* status: new => closed
* resolution: => invalid
Old description:
> Consider a model like this:
>
> {{{
> class Example(models.Model):
> json = JSONField(
> default=list,
> blank=True
> )
> }}}
>
> Creating an object programmatically works and applies the default value
> just fine. Saving an object with an empty value for the `JSONField`
> triggers an IntegrityError because Django tries to save an object with
> `null` instead of the default.
>
> I'm not sure whether this ticket is a duplicate of
> https://code.djangoproject.com/ticket/27697 but I think this issue with
> the ignored default may have a different origin.
New description:
Consider a model like this:
{{{
class Example(models.Model):
json = JSONField(
default=list,
blank=True
)
}}}
Creating an object programmatically works and applies the default value
just fine. Saving an object with an empty value for the `JSONField`
triggers an `IntegrityError` because Django tries to save an object with
`null` instead of the default.
I'm not sure whether this ticket is a duplicate of #27697 but I think this
issue with the ignored default may have a different origin.
--
Comment:
Yes, I think this is a duplicate of #27697, although the desired behavior
you describe isn't how Django uses model field defaults. Those defaults
are only used to populate the initial the form. If a user removes that
value, the default isn't called again when the form is submitted.
--
Ticket URL: <https://code.djangoproject.com/ticket/27955#comment:2>
Django <https://code.djangoproject.com/>
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